Improvement in slitting-gages



NITED STATES PATENT OFFICE.

JOHN W. VAN DEVENTER, OF DUNDEE, MICHIGAN.

Specieation forming part of Letters Patent No. 41,797, dated March 1,1864.

To all whom it may concern,.-

Be it known that I, JOHN W. VAN DE- VENTER, of Dundee, in the county ofMonroe and State Michigan, have invented a new and ImprovedSlitting-Gage; and I do hereby deelare that the following is a full,clear, and exact description of the same, reference being had to theaccompanying drawings, makinga part of this specification, in which-Figure l is a side sectional view of my invention, taken in the line xFig. 2; Fig. 2, a transverse vertical section ot' the same, taken in theline gl y, Figfl.

Similar letters of reference indicate corresponding parts in the twofigures.

The object of this invention is to obtain a slitting-gage of simpleconstruction, which will admit of its knife being adjusted with thegreatest facility, in order to cut at a greater or less depth, asdesired, and lalso admit of havingits parts detached, so as to renderthe device portable when not required for use, or when stowed away, orpacked for transportation. Y

To enable those skilled inthe ait to fully understand and construct myinvention, I will proceed to describe it.

A represents the bar or beam ofthe device, which may be of wood, and Bis a slide fitted in the beam A, and secured to it at any desired pointby a set-screw, C. This slide may also be of wood.

I) ri presents the handle or head of the device, the form of which isshown clearly in Fig. 2. This handle or head may be of cast. iron, andit is provided with a socket, a, at one side of its lower end, saidsocket receiving one end of the beam A, the latter being secured in theformer by a screw, b, as shown clearly in Fig. l.

In the handle or head D there is made a vertical hole or opening, c, inwhich the cutter E is tted, said cutter extending through an orifice inthe bottom of the head. This cutter has its cutting-edge of the usualform, and its shank is provided with a nut, d, through which aset-screw, e, passes, said set-screw passing through a screw or plug, f,which is tted in the upper orice of the hole or opening c. By turningthe screw e the cutter E may be raised or lowered so that itscutting-edge may operate at a greater or less depth, as may be required.

In the lower part of the head D there is made a horizontal hole oropening, f, in which a key or wedge,I `,istitted. This key or wedgepasses the cutter E, and binds against it so as to hold it firmly inposition, as will be understood by referring to Fig. 1.

In adjusting the cutter higher or lower, the key or wedge F is removed,and inserted in its place when the cutter is brought to the desiredpoint. In the face or lower part of the head D there is fitted afriction-roller, G, which is at the inner side of the cutter E, and isdesigned to obviate friction as the head D is shoved over the face ofthe board.

By adjusting the slideBon the beam A the boa-rd or stuit' may be slttedof any required width, and as near to the right-hand edge of the boardas may be required.

When the device is not required for use,

lthe handle or head may be removed, as well as the slide, and the partspacked or stowed of the handle, a beam socket, a, at its side, a

screw, e, for adjusting the knife, and a tapering key, E, passing fromthe front into the lower part of the handle, and otherwise constructedand operating in the manner herein shown and explained.

JOHN W. VAN DEVENTER. Witnesses:

HENRY WA'rLING, JOSEPH PARKER.

